Most of this rumors are either straight up lies or just fan speculation.

__________________I was at some diplomatic party once. Got to talking to this princess who told me that when it came to Superman, I was missing the point. She told me, "His real strength lay in his generous spirit and sense of what's fair." - King Faraday
"He’s much more of a working class superhero, which is why we ended the whole book with the image of a laboring Superman. He’s Everyman operating on a sci–fi Paul Bunyan scale." - Grant Morrison

Haha, yeah now that you mention it, I think that is how the rumor went.

Others:

Zod speaks Kryptonian to Superman: "Don't you know your native tongue Kal-El?" (This might have been a deleted scene, but I think it was BS because the way that guy described the scene, it sounded like Superman had no idea who Zod was in it. And as we know, by the time Zod shows up, Superman knows exactly who he is).

Colonel Hardy is secretly Lex Luthor.

Superman creates a prison for Zod on some other planet.

Zod kills Faora.

Funny, some of these would have been better than what was actually in the film.

Oh yeah, I remember that. Some people were thinking he was going to be Doomsday.

I also remember (way back before Cavill was cast) someone actually created a bullsh** WB website that claimed that Cavill was out of the running but Routh was still being considered, along with some other actors.

__________________"Wonderful things can happen when you sow seeds of distrust in a garden of a**holes." - Raylan Givens